Feeding mechanism for weft-replenishing looms



E. H. RYdm FEEDING MECHANISM FOR WEFT REPLENI SHING LOOMS.

' APPLICATION FILED rs.2s. 1920.

Patented Feb. 22, 1921.

3 SHEETS-SHEET I.

E; H. RYON. FEEDING MECHANISM FOR WEFT REPLENISHING LOOMS.

. APPLICATION FILED FEB. 26' 1920. 1,369,474.

Patented Feb. 22, 1921 3 SHEETS-SHEET 2.

E. H. RYON. FEEDING MECHANISM FOR WEFT REPLENISHING LOOMS.

APPLICATlON HLED FEB- 26. I920.

Patented Feb. 22, 1921.

SHEET 3.

3 SHEETS 1 UNITED STATESPATENT OFFICE.

EPPA H. RYON, OF WALTHAM, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOBZ WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.

FEEDING MECHANISM FOR WEFT-REPLENISH ING LOOMS.

Application filed February 26, 1920. Serial No. 361,498.

To all whom it may concern: I

Be it known that I, EPPA H. RYoN, a citizen of the United States, residing at Waltham, in the county of Middlesex and State of Massachusetts, have invented a new and useful Feeding Mechanism for Weft-Replenishing Looms, of which the following is a specification.

This invention relates to a mechanism for advancing fresh weft carriers to trans fer position in a weft replenishing loom.

In. weaving certain classes of goods, two shuttles are used with a single kind of weft, two picks of weft from each shuttle being inserted alternately. The object of thisconstruction is to mix the weft so that no variation may be apparent when a fresh weft carrier is inserted.

It is the object of my present invention to provide mechanism bywhich the advance of a fresh weft carrier to transfer position may be delayed after indication of substantial weft exhaustion, so that transfer will only occur upon the ,return of the indicated shuttle which will be on the fourth pick after indication.

A further object of my invention is to provide mechanism of this character available to indicate approaching exhaustion of the second shuttle betweenindication and re plenishment of the first shuttle, should such substantially simultaneous exhaustion occur.

My'invention further relates to arrange ments and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of my invention is shown'in the drawings in which- Figure 1 is a side elevation of certain parts of a weft carrier magazine with my improved feeding mechanism. applied there- Fig. 2 is a front elevation thereof;

Figs. 3, 4, 5 and 6 are enlarged side ele vations of the feeding mechanism, showing the, parts in different successive positions;

, Fig. '7 is a detail sectional view. taken along the line 7-7 in Fig. 1, and A Fig. 8 is a partial perspective view of a part to be described.

Referring to the drawings, I have shown a frame 10'n1ounted on a breast beam 11 and forming a portion of a rotary ma azinc of well known construction. A rate et wheel 12 is secured to the magazine and rotates therewith, certain teeth of said ratchet wheel being designated as a, b, c, d and e for the purposes of this description.

A holding pawl 13 is pivoted at 14 on the frame 10 and'is yieldingly held in operative position by a spring 15. The pawl 13 is shown in the drawings in engagement with the tooth a of the ratchet wheel 12.

' A transferrer 16 is pivoted at 17 on the frame 10 and is preferably given a downward transferring movement on each alternate beat of the lay by a link 18 connected to actuating mechanism not shown. A rod 19 (Fig. 7) is mounted to slide transversely in the head of the transferrer 16 and is posltioned by weft indicating mechanism mounted on the head of the transferrer.

A full description of suitable actuating mechanism may be found in my 00- ending application, Serial No. 244,637 filed uly 12 1918 and a complete description of suitable weft detecting mechanism for positioning the rod 19 may be found in my co-pending ap plication Serial No. 297 ,302, filed May 15, 1919. For the purpose of this application, it is sufficient to state that the rod 19 is movedto the left in Figs. 2 and 7 upon indication of substantial weft exhaustion.

A feed pawl 20 is pivoted at 21 on' the transferrer 16 and a spring 22 is connected at one end to the pawl 20, and at the other end to a stud 23 on the transferrer 16. The normal position of the parts is shown in Fig. 1 in which the feed pawl 20 engages the tooth c ofthe ratchet wheel 12 and the holding pawl 13 engages the tooth a.

' A shield 24 normally covers the tooth d immediately below the feed pawl and prevents engagement of the feed pawl therewith. The shield 24 is provided with a split bearing 25 mounted on the hub of the Patented Feb. 22, 1921.-

V and said arm is provided with a cam face or shoulder 29 (Fig. 8) positioned for engagement by the pin 19 when the latter is in the left-hand position shown in Fig. 7. An additional cam projection 30 is formed on the arm 28 for resetting the pin 19.

A second arm 31 is formed on the shield 24 and projects directly forward where it is upturned to engage a stud 32 on the holding pawl 13, preventing displacement of the pawl 13 when swung away from the ratchet wheel 12. The feed pawl 20 also has an upward projection 33 positioned adjacent the stud 32. This stud is grasped by the operator and moved forward to withdraw both pawls'20 and 13 from. the ratchet wheel 12, when the operator wishes to revolve the weft carrier, holder backward for replenishment. Such withdrawal movement is limited by the upturned end of the projection 31.

A stud 3a in the pawl limits downward movement of the projection 31, while upward movement thereof is limited by the stud 32.

Having described the construction of my improved feeding mechanism, I will now describe its operation. The normal position of the parts is shown in Fig. 1 in which the holding pawl. 13 engages the tooth a of the ratchet wheel and the feed pawl is at the upper limit of its stroke and engages the tooth c of the ratchet wheel. A weft carrier WV in the shuttle is positioned for engagement by the weft detecting mechanism as the transferrer 16 thereafter moves downward. j a Such engagement is shown in Fig. 3 in whit-hit is assumed that the weft carrier W is sulrstantially exhausted, and has caused movement of the rod 19 to the operative position shown in Fig. 7. The feed pawl 20 rests against the shield 24.

The next succeeding upward movement of the transferrer places the parts in the position shown in Fig. 4 where it will be seen that the feed pawl 20 again engages the tooth c ofthe ratchet wheel 12, as in. Fig. 1., but that the shield 24 has been moved by engagement of the pin 19 with the cam portion 29 (Fig. 8) so that the tooth d is no longer covered by the shield. The relation of the parts is such, however, that the tooth (l is not uncovered until the feed pawl 20 has passed above the point of the tooth d in its upwardmovement.

The parts are shown in Fig. 5 in the po- 'sumed in Fig. 4 to have a sufficient supply of weft thereon. During this downward movement the rod 19 is engaged by the cam projection 30 on the arm 28 and is reset in inoperative position by such engagement.

In Fig. 6 the parts are shown in mid position during the next upward movement of the transferrer, the feed pawl 20 engaging the tooth cl of the ratchet wheel 12 and being about to advance the weft carrier TV in the magazine to the transfer positionindr cated in dotted lines in Fig. 6. As the magazine is fed forward the shield 24 mounted frietionally thereon moves therewith and protects the tooth e of the ratchet wheel 12. The parts are thus restored to normal operative position with the holding pawl 13' engaging the tooth 6 instead ofthe tooth a. v

If the weft carrier W should be found substantially exhausted when the parts are in the position shown in Fig. 5, thepin 19 will be again moved to the left inFig. 7 and during the feeding operation shown in Fig. 6. the pin will move the shield 2 1 to uncover the tooth 6. so that a second advance of the magazine will occur onthe next upward movement of the transferrer following the movement of Fig. 6. l i

l have thus provided feeding mechanism by which the advance ofa fresh weft carrier to transfer position is delayed so that transfer can onlyoccur on the fourth pick after indication of substantial weft exhaustion. and I have also provided mechanism permitting substantial weft exhaustion in two shuttles to besuccessively and independently indicated. 7

The counter weight 27 is provided to prevent displacement of the shield'24 during the relatively long period between weft carrier transfers, when the continued jar of the machine might displace the parts if dependence were placed on friction alone to hold the shield in position. With the coun- 'ter weight in use, only upward displacement of the shield is possible and such movement is limited by engagement of the arm 31 with the stud 32 (Fig. 1) on the holding pawl 13. 7

Certain features of my invention are not esa-174 of weftcarrier magazine.

Having thus described my invention, it will be evident that changes and modifications can be made therein by those skilled in the art within the spirit and scope of my invention as set forth in the claims, and I do not wish to be otherwise limited to the details herein disclosed, but what I claim is 1. In a loom, in combination, a rotary magazine, a transferrer having a transferring movement at each alternate beat of the lay, feeding means associated with said transferrer effective to advance the magazine angularly after indication of substantial weft exhaustion, and means to delay the operation of said feeding means.

2. In a loom, in combination, a rotary magazine, a transferrer having a transfer ring movement at each alternate beat of the lay, and means associated with said transferrer effective to advance the magazine after indication, of substantial weft exhaustion, saidmeans becoming operative only on the second upward movement of said transferrer after such indication.

In a loom having two shuttles each given two picks alternately, in combination, a rotary magazine, means to feed said magazine after indication of substantial weft exhaustion, and a device effective to delay the operation of said feeding means so that transfer will occur only on the return of the indicated shuttle.

4. In a loom having two shuttles eac given two picks alternately, in combination, a rotary magazine, a transferrer having a transferring movement at each alternate beat of the lay, and means to delay weft carrier transfer after indication of substantial weft exhaustion until the substantially exhausted shuttle returns to transfer position. I

5. In a loom, a rotary magazine, a transferrer movable on alternate picks to determine substantial weft exhaustion, and means to feed said magazine topresent a fresh weft carrier in transfer position after the next succeeding actuation of the transferrer following indication of substantial weft exhaustion, said weft carrier being thereafter transferred on the second actuation of said transferrer following indication of substantial weft exhaustion.

6. In a loom having two shuttles each giving two picks alternately, in combination, a rotary magazine, a transferrer having a transferring movement at each alternate beat of the lay, and means to delay weft carrier transfer after indication of substantial Weft exhaustion until the substantially exhausted shuttle returns to transfer position, said means being also effective to similarly delay transfer to the second shuttle if sublimitedin'their utility to the rotary type stantialweft exhaustion thereof is indicated before the first shuttle is replenished.

"7. In a loom, in combination, a rotary magazine having a ratchet wheel, a transferrer actuated on eachalternate beat of the lay, a feed pawl for said ratchet wheel moved with said transferrer, a device effective to maintain said feed pawl normally inoperative, and means to move said device after indication of substantial weft exhaustion, thereby permitting said feed pawl to advance said magazine.

8. In a loom, a rotary magazine having a ratchet wheel, a transferrer movable on alternate picks to determine substantial weft exhaustion, a feed pawl for said ratchet wheel moved with said transferrer, and means to control the operation of said feed pawl to render the pawl inoperative only after the next downward movement of the transferrer following indication of substantial weft exhaustion.

9. In a loom, in combination, a rotary magazine having a ratchet wheel, a transferrer, a feed pawl mounted on said transferrer, a shield normally rendering said feed pawl inoperative, and means to withdraw said shield after indication of substantial weft exhaustion.

10. In a loom, in combination, a rotary magazine having a ratchet wheel, a regularly actuated transferrer, a feed pawl for said ratchet wheel mounted on the transferrer, a shield for said ratchet Wheel, and means on the transferrer effective to engage and move said shield after indication of substantial weft exhaustion, thereby rendering tionally engaging the same, and means on the transferrer effective to engage and move said shield against the friction on indication of substantial weft exhaustion, thereby rendering said feed pawl operative.

12. In a loom, in combination, a rotary magazine having a ratchet wheel, a regularly actuated transferrer, a feed pawl for said ratchet wheel, a shield for said feed pawl mounted on the magazine and frictionally engaging the same, means on the transferrer effective to engage and move said shield against the friction on indication of substantial weft exhaustion, thereby rendering said feed pawl operative, a stop for said shield and a counter weight associated with said shield acting to move said shield against said stop.

13. In a loom, in combination, a rotary magazine having a ratchet wheel, a regularly actuated transferrer, a feed pawl for said ratchet wheel, a shield for said'feed pawl, astop for said shield, means to move said shield positively away from said stop, and means to prevent accldental movement of said shield away from said stop.

14. In a loom, in combination, a weft carrier magazine, weft detecting mechanism,

means to feed a weft carrier forward to transfer position after indlcation of substantial weft exhaustion, and a device efiec- 10 tive' to' delay the operation of said feeding means so that normal transfer will occur only on the fourth pickof the loom after indlcation. V y 7 In testimony whereof I have hereunto aflixed my signature.

EPPA RYON. 

